boehm::ffi::GC_finalization_proc
type GC_finalization_proc = "C" fn(arg1: *mut c_void, arg2: *mut c_void);
type GC_finalization_proc = "C" fn(arg1: *mut c_void, arg2: *mut c_void);
                Prefix searches with a type followed by a colon (e.g.
                fn:) to restrict the search to a given type.
            
                Accepted types are: fn, mod,
                struct (or str), enum,
                trait, typedef (or
                tdef).